Shares of Advanced Disposal Services , a waste collection company, were trading at $19.93, above the company's $18 issue price, in the stock's debut on the New York Stock Exchange Thursday. Advanced Disposal sold 19.25 million shares to raise $346.5 million. The company said it will use the proceeds to repay oustanding borrowings. Deutsche Bank Securities, Credit Suisse Securities and Barclays Capital acted as the lead underwriters.